Armstrong G2D93CT User manual

506303-01 Page 1 of 40Issue 0938
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INSTALLATION INSTRUCTIONS
G2D93CT, G2D93CU, G2D95CT, & G2D95CU
High Efficiency Multiposition Gas Furnace
with System Sentry™ Control System
Improperinstallation,adjustment,alteration,service,ormaintenancecancauseinjuryorpropertydamage.
Refer to this manual. For assistance or additional information, consult a qualified installer, service agency,
or the gas supplier.
WARNING
Donot store combustible materials, includinggasoline and
other flammable vapors and liquids, near the furnace, vent
pipe, or warm air ducts. The homeowner should be
cautioned that the furnace area must not be used as a
broomclosetorforanyotherstoragepurposes. Suchuses
may result in actions that could cause property damage,
personal injury, or death.
WARNING
This furnace is not approved for installation in a mobile
home. Do not install this furnace in a mobile home.
Installation in a mobile home could result in actions that
could cause property damage, personal injury, or death.
WARNING
The installation of the furnace, wiring, warm air ducts, venting, etc. must conform to the requirements of the National Fire
Protection Association; the National Fuel Gas Code, ANSI Z223.1/NFPANo. 54 (latest edition) and the National Electrical
Code,ANSI/NFPANo.70(latestedition)intheUnitedStates;CSAB149.1(latestedition)NaturalGasandPropaneInstallation
Codes and the Canadian Electrical Code Part 1, CSA22.1 (latest edition) in Canada; and any state or provincial laws, local
ordinances (including plumbing or wastewater codes), or local gas utility requirements. Local authorities having jurisdiction
should be consulted before installation is made. Such applicable regulations or requirements take precedence over the
general instructions in this manual.
IMPORTANT
Manufactured By
Allied Air Enterprises Inc.
A Lennox International Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
TABLE OF CONTENTS
SAFETY ........................................................ 2
INSTALLATION ............................................. 3
START-UP...................................................26
OPERATION ............................................... 27
MAINTENANCE .......................................... 32
CONTROL DIAGNOSTICS ......................... 33
REPAIR PARTS .......................................... 34
WIRING DIAGRAMS................................... 35
*506303-01*

506303-01
Page 2 of 40 Issue 0938
The following is a list of safety rules and precautions that
must be followed when installing this furnace.
1. Use onlywiththe type ofgasapprovedfor thisfurnace.
Refer to the furnace rating plate.
2. Install this furnace only in a location and position as
specified in the Location section on page 3 of these
instructions.
3. Provide adequate combustion and ventilation air to the
furnace space as specified in the Combustion and
VentilationAir section on page 4 of these instructions.
4. Adequate clearance must be provided around the
vent-air intake terminals as specified in the Venting
section beginning on page 5 of these instructions.
5. Combustion products must be discharged outdoors.
Connect this furnace to an approved vent system only,
as specified in the Venting section beginning on page
5 of these instructions.
6. Never test for gas leaks with an open flame. Use a
commerciallyavailable soapsolutionmade specifically
for the detection of leaks to check all connections, as
specified in Gas Supply and Piping beginning on
page 20 of these instructions.
IMPORTANT SAFETY INFORMATION
7. Always install furnace to operate within the furnace’s
intended temperature-rise range with a duct system
which has an external static pressure within the
allowable range, as specified in Temperature Rise
on page 31 of these instructions. See furnace rating
plate.
8. When a furnace is installed so that the supply ducts
carry air circulated by the furnace to areas outside
the space containing the furnace, the return air shall
also be handled by duct(s) sealed to the furnace
casing and terminating outside the space containing
the furnace. See CirculatingAir Supply on page 19
of these instructions.
9. A gas-fired furnace for installation in a residential
garagemustbeinstalledas specified in the Location
section on page 3 of these instructions.
10. The furnace is permitted to be used for temporary
heating of buildings or structures under construction
asspecifiedintheLocation sectionbeginningonpage
3 of these instructions.
In the State of Massachusetts:
This product must be installed by a licensed Plumber
or Gas Fitter. When flexible connectors are used, the
maximum length shall not exceed 36". When lever-
type gas shutoffs are used, they shall be T-handle
type.

506303-01 Page 3 of 40Issue 0938
INSTALLATION
These instructions must be placed on or near the
furnace in a conspicuous place.
The furnace design is certified by CSA International as a
Category IV furnace in compliance with the latest edition of
American National Standard Z21.47/CSA Standard 2.3 for
Gas-Fired Central Furnaces, for operation with natural gas
or propane. Consult the rating plate on the furnace for gas
type before installing.
The maximum hourly heat loss of space shall be calculated
in accordance with the procedure described in the current
manuals of Air Conditioning Contractors of America, or by
any other recognized method which is suitable for local
conditions, provided the results obtained are in substantial
agreement with, and not less than, those obtained using
the procedure described in the manuals.
G2D93CTandG2D95CTfurnacesmaybeinstalledasupflow
or horizontal right to left or left to right ariflow furnaces.
When installed horizontally, the installer must install a sheet
metal screw to retain the upper door as shown in Figure 1.
G2D93CU and G2D95CU furnaces must be installed only as
upflow furnaces.
Never install any furnace on its back.
Inspection of Shipment
This furnace is shipped in one package, completely
assembled and wired. The thermostat is shipped in a
separate carton when ordered.
Upon receipt of equipment, carefully inspect it for possible
shipping damage. If damage is found, it should be noted
on the carrier’s freight bill. Damage claims should be filed
with the carrier immediately. Claims of shortages should
be filed with the seller within 5 days.
Location
To provide proper operation and satisfactory performance,
care must be taken in choosing the location for this furnace.
The atmosphere in which the furnace operates must be free
of contaminants such as chlorides and sulfates.
Thefurnacemustbe installedsothat electrical components
are protected from water. Unit must be level for proper
condensate drainage.
To avoid property damage caused by condensate drain
blockage, install a field-fabricated auxiliary drain pan with a
separate drain line to the outside under the entire furnace
and drain system. Install according to local codes.
All models are suitable for closet or utility room installation.
The furnace is suitable for installation in buildings
constructed on-site. The furnace should be centralized in
respect to the heat distribution system as much as
practicable. When installed in a utility room, the door
should be wide enough to allow the largest part of the
furnace to enter, or permit the replacement of another
appliance, such as a water heater.
A gas-fired furnace for installation in a residential garage must
beinstalled so the burner(s) and the ignition sourceare located
not less than 18" above the floor. The furnace is to be located
or protected to avoid physical damage by vehicles.
Thisfurnaceisnotrecommendedtobeusedasaconstruction
heater during any phase of construction. Very low return air
temperatures, harmful vapors, and operation of the unit with
clogged or misplaced filters will damage the unit.
The furnace may be used for heating of buildings or
structuresunderconstruction,ifthe following conditions are
met:
• The vent system must be permanently installed per
these installation instructions.
• A room thermostat must control the furnace. The use
of fixed jumpers that will provide continuous heating is
not allowed.
The condensate system must not be exposed to
temperaturesunder32°F. Thecondensatesystemmust
beinsulatedifexposedtotemperatures under32°F. Use
ofheattapeis permissible provided the rate temperature
of the tape does not exceed 155°F.
CAUTION
Horizontal Installations
Figure 1
Horizontal right
to left airflow
shown

506303-01
Page 4 of 40 Issue 0938
Unconfined Space
An unconfined space is defined as “a space whose volume
is more than 50 cubic feet per 1000 BTU per hour of the
combined input rating of all appliances installed in that
space.” Whena furnace is installed in an unconfined space
in a building, it can be assumed that the infiltration will be
sufficienttosupplytherequiredair. Ifthefurnaceisinstalled
in a ventilated attic or crawl space, it is assumed that the
infiltration is sufficient to supply the required air. However,
in a building of unusually tight construction, additional
outdoor air should be provided.
• The return air duct must be provided and sealed to the
furnace.
• Return air temperature range between 60°F and 80°F
must be maintained.
• Air filters must be installed in the system and must be
maintained during construction.
• Air filters must be replaced upon construction
completion.
• The input rate and temperature rise must be set per
the furnace rating plate.
• One hundred percent (100%) outdoor air must be
provided for combustion air requirements during
construction. Temporary ducting may supply outdoor
air to the furnace. Do not connect duct directly to the
furnace. Size the temporary duct following the
instructions given on this page in the Combustion and
Ventilation Air section regarding confined space with
air from outside.
• The furnace heat exchanger, components, duct system,
air filters, and evaporator coils must be thoroughly
cleaned following final construction cleanup.
• Allfurnace operating conditions (including ignition, input
rate, temperature rise, and venting) must be verified
according to these installation instructions.
G2D93CT and G2D95CTmodels installed in the horizontal
position are approved for attic installations. If the furnace
is to be installed in an attic or other insulated space, it
must be kept free and clear of insulating materials.
Clearances
All servicing and cleaning of the furnace can be performed
from the front. If installed in a closet or utility room, provide
18" clearance in front for service if the door to the room is
not in line with the front of the furnace.
RefertoTable 1 fortheminimumclearances to combustibles
required for construction and proper unit operation. Where
servicing clearances are greater than clearances to
combustibles, servicing clearances take precedence.
G2D93CT and G2D95CT models may be installed on wood
flooring but shall not be installed directly on carpeting, tile, or
any other combustible material.
Combustion and Ventilation Air
Adequate provisions for combustion air and ventilation of
furnace must be made. Refer to Section 5.3, “Air for
Combustionand Ventilation,”oftheNational FuelGasCode,
ANSI Z223.1/NFPA54 (latest edition), Sections 7.2, 7.3, or
7.4 of CSA B149.1 Natural Gas and Propane Installation
Codes (latest editions), or applicable provisions of the local
building codes.
Insufficientcombustionaircancauseheadaches,nausea,
dizziness,orasphyxiation.Whenconsideringcombustion
air requirements, enough air must also be provided to
meettheneedsofallfuel-burningappliancesandexhaust
fans.
WARNING
Air openings in the front of the furnace must be kept free
of obstructions. Any obstruction may cause improper
operation that can result in a fire hazard or carbon
monoxide injury.
WARNING
Table 1
Minimum Clearances to
Combustibles
Upflow Horizontal
Sides 0” 0”
Rear 0” 0”
2” 18”
0” 0”
1” 1”
Front
Flue Pipe
Plenum

506303-01 Page 5 of 40Issue 0938
5. Exposure to the following substances in the combustion
air supply may also require outdoor air for combustion:
• Permanent wave solutions
• Chlorinated waxes and cleaners
• Chlorine-based swimming pool chemicals
• Water softening chemicals
• Deicing salts or chemicals
• Carbon tetrachloride
• Halogen-type refrigerants
• Cleaning solvents (such as perchloroethylene)
• Printing inks, paint removers, varnishes, etc.
• Cements and glues
• Antistatic fabric softeners for clothes dryers
• Masonry acid washing materials
• Chlorinated laundry products
• Hydrochloric acid
Venting
The high efficiency of this furnace is accomplished by the
removal of both sensible and latent heat from the flue gases.
The removal of latent heat results in the condensation of
moisture in the flue gases. This condensation occurs in the
secondaryheatexchangerandintheventsystem.Therefore,
this furnace requires special venting considerations and the
instructions must be followed to insure proper operation. All
venting must be in accordance with the codes having
jurisdiction in the area and these instructions.
G2D93CT, G2D93CU, G2D95CT, and G2D95CU models
canbeinstalledas either direct vent or non-direct vent units.
A direct vent (two pipe) installation requires that all the air
necessary for combustion be supplied from outside the
dwelling through an air intake pipe. A non-direct vent (one
pipe) installation uses air from inside the dwelling for
combustion.
The furnace is shipped with the air inlet pipe terminated to the
top panel for either inside or outside combustion air.An inlet air
restrictor plate (see Figure 2 on page 6) is supplied with this
furnace and can be found in the plastic bag containing these
InstallationInstructionsandtheUser’sInformationManual.This
inlet restrictor plate must be used in all installations using
inside air for combustion (non-direct vent).
The inlet restrictor plate must be installed in the air inlet in
one of three ways:
•Restrictor plate in inlet collar: Install the restrictor
plate in the inlet pipe collar in the top panel of the
furnace. Insert a 3" to 36" section of PVC pipe (field
supplied) into the collar. Use high temperature RTV
sealant to attach PVC pipe to collar. A 90° elbow (field
supplied) may be attached to the PVC pipe, but the
elbow is not required. Use high temperature RTV
sealant to attach elbow to PVC pipe (if applicable).
Confined Space
A confined space is defined as “a space whose volume is
lessthan50cubicfeetper1000BTUperhourofthecombined
input rating of all appliances installed in that space.”
Ifthefurnaceisinstalledinaconfinedspacewithinthebuilding
and combustion air is taken from a heated space, the
combustion air and ventilating air must enter and leave the
space through two permanent openings of equal area. One
openingshallbelocatedwithin12" ofthe ceilingandtheother
within 12" of the floor, each having a free area of
1 square inch per 1000 BTU/HR of total input rating of all
appliances within the space and not less than 100 square
inches each.
If the furnace is installed in a space within a building of tight
construction, makeup air must be supplied from outdoors. In
this case, one opening shall be within 12" of the ceiling and
one opening within 12" of the floor. If combustion ducts are
vertical, each opening shall have a free area of 1 square inch
per 4000 BTU/HR of the total input rating of all appliances
within the enclosure. If horizontal combustion ducts are run,
1 square inch per 2000 BTU/HR is required.
Contaminated Combustion Air
Excessiveexposuretocontaminatedcombustionairwillresult
in safety and performance related problems. The
recommended source of combustion air is outdoor air.
However, the use of indoor air in most applications is
acceptable if the following guidelines are followed:
1. If the furnace is installed in a confined space, it is
recommended that the necessary combustion air come
from the outdoors by way of an attic, crawl space, air
duct, or direct opening.
2. If indoor combustion air is used, there must be no
exposure to the substances listed in Item 5.
3. All provisions for indoor combustion air must meet the
requirementsforcombustionair indicatedinthe National
Fuel Gas Code,ANSI Z223.1/NFPA54 (latest edition),
and/oranyapplicable local codes. In Canada, seeCSA
B149.1, Natural Gas and Propane Installation Codes
(latest edition).
4. The following types of installation may require outdoor
air for combustion, due to chemical exposures:
• Commercial buildings
• Buildings with indoor pools
• Furnaces installed in laundry rooms
• Furnaces installed in hobby or craft rooms
• Furnaces installed near chemical storage areas

506303-01
Page 6 of 40 Issue 0938
Theventing system must besupportedwithmountingstraps
to prevent any weight load from being applied to the vent
blower. Horizontal vent pipe must be supported every 5'
and vertical pipe should be supported every 10' to prevent
sagging and provide rigid support.
When a furnace is installed as direct vent, provisions for
ventilation air should follow the same requirements as if
installed as non-direct vent. Proper ventilation air is
necessary to maintain furnace component temperatures
within acceptable limits.
All vents passing through floors, ceilings, and walls must
be installed in accordance with National Fuel Gas Code,
ANSI Z223.1/NFPA 54 (latest edition).
Thelength of fluepipeexposedto outdoorconditionsshould
be kept to a minimum. When the installation requires more
than 3 feet of flue pipe be exposed to outdoor conditions,
insulating the exposed flue pipe with 1/2” Armaflex or
equivalent is recommended. In climates with design
temperatures below zero degrees (F), 3/4” Armaflex or
equivalent is recommended.
Materials
All pipe, fittings, primer, and solvent cement must conform
withAmerican National Standard Institute and the American
Society for Testing and Materials (ANSI/ASTM) standards.
The solvent shall be free flowing and contain no lumps,
undissolved particles, or any foreign matter that adversely
affectsthejointstrengthorchemicalresistanceofthecement.
The cement shall show no gelation, stratification, or
separation that cannot be removed by stirring.
Refer to Table 2 for approved piping and fitting materials.
Canadian Applications Only:
PVC pipe, fittings, primer and solvent cement used to vent
this applicance must be certified to ULC S636 and supplied
by a single manufacturer as part of an approved venting
system. In addition, the first three feet of vent p ipe from
the furnace flue collar must be accessible for inspection.
Modelsthatmaybeinstalledas a horizontalfurnaceinclude
a horizontal drain kit. In Canada this dain kit must be
replacedbyalocally available IPEX Drain Kit #196014. For
Local IPEX Canadian Customer Service Center and Kit
availability call IPEX at 1-866-473-9462.
The primers and solvents used must also meet ASTM
specifications. PVC primer is specified inASTM F656. Use
PVC solvent as specified inASTM D2564 andABS solvent
cementas specifiedASTMD2235.Lowtemperature solvent
cement is recommended. Metal or plastic strapping may
be used for vent pipe hangers.
•Restrictor plate in inlet pipe: Insert a 3" to 36" section
of PVC pipe (field supplied) into the collar. Use high
temperature RTV sealant to attach PVC pipe to collar.
Install the restrictor plate in the end of the inlet pipe just
installed. Attach either a field-supplied coupler or 90°
elbow to the end of the PVC pipe to keep the restrictor
plate in place. Use high temperature RTV sealant to
attach the coupler or elbow to PVC pipe.
•Restrictor plate in elbow: Insert a 3" to 36" section of
PVC pipe (field supplied) into the collar. Use high
temperature RTV sealant to attach PVC pipe to collar.
Attach a 90° elbow (field supplied) to the PVC pipe. Use
high temperature RTV sealant to attach elbow to PVC
pipe. Install the restrictor plate into the elbow.
Two different sized inlet restrictor plates are supplied with the
furnace (2" and 3"). Use the proper restrictor plate for the
furnace model.
Also included in the plastic bag containing the inlet air
restriction plate is a flue pipe screen (see Figure 2). In all
installations, this screen should be installed at the
termination of the flue pipe and is designed to keep objects
out of the flue pipe.
For either type of installation (direct or non-direct vent),
special venting considerations must be followed. Refer to
the proper section in pages 11 – 15 for the type of furnace
and venting being installed.
If at any time in the future the installation of this furnace
is changed to require outside fresh air for combustion,
the inlet air restrictor plate must be removed. Failure
to remove the inlet air restrictor could cause improper
operation that can result in a fire hazard or carbon
monoxide injury.
WARNING
Flue Pipe Screen
The flue pipe screen should be
installed at the termination of the flue
pipe in all installations.
Figure 2
Inlet Air Restrictor Plate
The inlet air restrictor plate must be
installed in all installations using inside
air for combustion (non-direct vent).

506303-01 Page 7 of 40Issue 0938
WhenmakingABSjoints,piecescanbepreparedwithaclean
dry cloth to clean inside socket surface of fitting and male
end of pipe to depth of socket. Refer to procedure specified
in ASTM D3138. When joining ABS to PVC materials, use
transition solvent.
PreferredfittingsareDWV style or long sweep. Seal all joints
gas tight with appropriate cement. In areas where vent and
airintakepipesare exposedtoabnormalstressoraresubject
to damage, schedule 80 pipe should be used.
Category IV Furnace Limitations
This furnace shall not be connected to any Type B, BW, or L
ventorventconnectorandshallnotbeconnectedtoanyportion
of a factory-built or masonry chimney. This furnace is not to
be common vented with any other appliance. The vent
pipe must not be connected to a chimney flue serving a
separate appliance designed to burn solid fuel.
Table 2
Piping and Fitting Specifications
D1785
Schedule 40 PVC
(Cellular Core Pipe) F891
Schedule 40 PVC
(Fittings) D2466
SDR-26
(Pipe) D2241
Schedule 40 ABS
(Pipe) D1527
Schedule 40 ABS
(Fittings) D2468
Schedule 40 & 80 CPVC
(Pipe) F441
ABS-DWV
Drain Waste & Vent
(Pipe & Fittings)
D2661
PVC-DWV
Drain Waste & Vent
(Pipe & Fittings)
D2665
Piping & Fitting
Material
ASTM
Specification
Schedule 40 PVC (Pipe)
SDR - 26 CPVC (Pipe) F442
Schedule 40 ABS
Cellular Core DWV
(Pipe)
F628
Schedule 40 & 80 CPVC
(Fittings) F438
Figure 4
Vent Tables *
(numbers in inches unless specified otherwise)
Minimum Pipe Diameter
40,000 – 60,000 BTU/HR Models
NR = Not Recommended
Minimum Pipe Diameter
125,000 BTU/HR Models
Minimum Pipe Diameter
80,000 – 100,000 BTU/HR Models
* 2” not recommended at altitude above 4,000 ft.
3” required for altitude above 5,000 ft.
0123456789
222222222
2222222
2
3333
33333
Vent Pipe
Length
(ft.)
Number of 90° Elbows
5
10
20
30
40
50
60
70
80
90
1.5 1.5
1.5
22222222
2.5
2222222
22
2.5 2.5 2.5
2.5 2.5 2.5 2.5 2.5
22 2 22
32.5 2.5 2.5 2.5 2.5 2.5 2.5
3
3
3
2.5
2
2
2.5 2.5 2.5 2.5 2.5
2.52.52.5
2.52.5
2.5
2.5
2.5
2.52.5
3333 3
NR
NR NR
NR NR NR
0123456789
222
222
222 333
333333
3333
33
Vent Pipe
Length
(ft.)
Number of 90° Elbows
5
10
20
30
40
50
60
70
80
90
3
3
33 3
3 3 3
333
3 3 333
2.5
2.5 2.5 2.5
2.5 2.5 2.5
2.5 2.5 2.5 2.5
2.5 2.5 2.5 2.5
2.5 2.5 2.5
2.5
2.5
2.5 2.5
NR
NR
NR
2
NR
2
22222
22222
2
2
NR NR NR
NR NR NR NR NR
NR NR
NRNR
NR
NR NR NR NR NR NR NR
NR
0123456789
.
3
33
Vent Pipe
Length
(ft.)
Number of 90° Elbows
5
10
20
30
40
50
60
NR
2.5
3
3
33
3
3
3
NR
NR
NR
NR
NR NR NR NR NR NR NR NR
NR
NRNR
NR
NR
NR
NR NR NR
NR NR
2.5
2.5 2.5 2.5 2.5
2.5 2.5 2.5 2.5 2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.52.52.5
2.5
2.5 2.5 2.5 2.5 2.5
2.52.5
2.52.52.5
2.5
2.5
2.52.5
Figure 3
Concentric Vent Kit Dimensions

506303-01
Page 8 of 40 Issue 0938
Concentric Vent Kit
Aconcentric vent kit (seeAccessories section on page 34 for
correct kit) is available for use when installing this furnace as
a direct vent furnace and the air intake and vent pipe are to
be run through the same hole, whether horizontally through
the wall or vertically through the roof (see Figure 3). Refer to
the instructions included with the concentric vent kit for
installation specifics.
Vent Pipe Size and Length
Theventpipeandairintakepipe (in direct vent installations)
should be sized in accordance with the information found
in the appropriate table in Figure 4. One 90° elbow is
equivalent to 5' of pipe. Two 45° elbows are equivalent to
one 90° elbow. The minimum length certified for use with
this furnace is 5' and one elbow, not including the vent and
air intake terminals.
In the event that the pipe length is in between the lengths
listed in the table, use the next larger length listed. For
example, if a length of pipe needed to install the furnace is
27', use the diameter values for the 30' row in the tables.
For direct vent installations, if the vent and air intake pipe
are not equal in length and number of elbows, then
determinethe minimum pipe diameter for both the vent and
air intake. If the results indicate different diameters, use
the larger of the two for both the vent and air intake. Under
no circumstances should the vent and air intake pipe
size be different in diameter. Forinstallationdetails,refer
tothe appropriate section in pages11 – 15 for the unit model
and type of installation.
High Altitude Installation: 2” pipe not recommended at
altitudeabove 4,000 feet. 3” pipe required for altitude above
5,000 feet.
Horizontal Venting
The vent for this appliance shall not terminate over public
walkways; or near soffit vents or crawl space vents or other
areas where condensate or vapor could create a nuisance
or hazard or cause property damage; or where condensate
vapor could cause damage or could be detrimental to the
operation of regulators, relief valves, or other equipment.
See Figures 5 and 6 on pages 9 and 10 for additional
information on where the horizontal vent terminal can and
cannot terminate.
For Masschusetts Installations: The installation must
comply with Massachusetts 248 CMR 5.08 Modifications
to sections of NFPA-54, Chapter 10. (See pages 39 and
40)

506303-01 Page 9 of 40Issue 0938
Figure 5
Sidewall Vent Terminal Clearances (Direct Vented Furnaces)
1In accordance with the current CSA B149.1, Natural Gas and
Propane Installation Code
2In accordance with the current ANSI Z223.1/NFPA 54, National Fuel
Gas Code
†A vent shall not terminate directly above a sidewalk or paved
driveway that is located between two single family dwellings and
serves both dwellings.
‡Permitted only if veranda, porch, deck, or balcony is fully open on a
minimum of two sides beneath the floor.
* For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1,
the following statement shall be included:
“Clearance in accordance with local installation codes and the
requirements of the gas supplier and the manufacturer’s installation
instructions.”
V
X
Vent Terminal
Air Supply Inlet
Area Where Terminal Is
Not Permitted
A ** Minimum 12” (30 cm) above grade or
12” (30 cm) above average snow accumulation.

506303-01
Page 10 of 40 Issue 0938
Figure 6
Sidewall Vent Terminal Clearances (Non-Direct Vented Furnaces)
1In accordance with the current CSA B149.1, Natural Gas and
Propane Installation Code
2In accordance with the current ANSI Z223.1/NFPA 54, National Fuel
Gas Code
†Avent shall not terminate directly above a sidewalk or paved
driveway that is located between two single family dwellings and
serves both dwellings.
‡Permitted only if veranda, porch, deck, or balcony is fully open on a
minimum of two sides beneath the floor.
* For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1,
the following statement shall be included:
“Clearance in accordance with local installation codes and the
requirements of the gas supplier and the manufacturer’s installation
instructions.”
V
X
Vent Terminal
Air Supply Inlet
Area Where Terminal Is
Not Permitted
A ** Minimum 12” (30 cm) above grade or
12” (30 cm) above average snow accumulation.

506303-01 Page 11 of 40Issue 0938
For horizontal venting in situations where clearance to floor
joists is limited, see Horizontal Venting – Low Clearance
Installations on page 15.
Upflow Direct Vent Installation
An inlet air restrictor plate (see Figure 2 on page 6) is
supplied with this furnace and can be found in the plastic
bagcontainingthese InstallationInstructionsandtheUser’s
Information Manual. This restrictor plate is to be used
only in non-direct vent applications. Seepage5 for more
informationon installingtherestrictor plate in non-direct vent
applications.
The flue pipe screen (see Figure 2 on page 6) should be
installed at the termination of the flue pipe and is designed
to keep objects out of the flue pipe. An additional screen
should not be placed in the intake termination. If a screen
is installed, the air intake may freeze shut.
Forhorizontalventing,refertoFigure 7. For vertical venting,
refer to Figure 8. It is permissible to run the vent vertically
through the roof and terminate it as shown in Figure 8, and
to run the combustion air intake pipe horizontally through a
side wall and terminate as shown in Figure 7. The vent pipe
onhorizontal runsmustslopeupward,awayfromthefurnace,
at a minimum pitch of 1/4" per foot of run, to prevent
accumulation of condensate.
Do not cement air intake into the connector on burner
box. Use high temperature RTV silicone sealant so
intake pipe can be removed if service is required.
Inhorizontalventingapplications, the vent and air intake
pipe must be installed on the same side of the house
within the parameters shown in Figure 7.
Figure 7
Upflow Direct Vent – Horizontal Venting
* Maintaining a vertical separation
between the flue outlet and the air
intake of at least 18” is highly
recommended to minimize the
chance of flue gasses recirculating
and freezing in the air intake pipe.
This distance may be reduced in
milder climates or where wind is
unlikely to blow flue products to the
intake pipe, but should not be less
than 6”.
THIS PIECE
IS OPTIONAL.
INTAKE PIPE
FLUE PIPE
3” MIN. - 48” MAX.
Overhead View
Upflow Direct Vent – Vertical Venting
Figure 8

506303-01
Page 12 of 40 Issue 0938
Horizontal Direct Vent Installation
Aninletairrestrictor plate(seeFigure2on page6)issupplied with
this furnace and can be found in the plastic bag containing these
Installation Instructions and the User’s Information Manual. This
restrictor plate is to be used only in non-direct vent
applications. See page 5 for more information on installing
the restrictor plate in non-direct vent applications.
The flue pipe screen (see Figure 2 on page 6) should be
installed at the termination of the flue pipe and is designed
to keep objects out of the flue pipe. An additional screen
should not be placed in the intake termination. If a screen
is installed, the air intake may freeze shut.
Maintaining a vertical separation between the flue outlet and
theairintakeofatleast18”ishighlyrecommendedtominimize
the chance of flue gasses re-circulating and freezing in the
air intake pipe. The 18” separation is shown for horizontal
Prime the trap system by slowly pouring 1 cup of water down
the vent pipe. On initial start-up of the unit, some of the
water used to prime the trap system may run down into the
combustion blower and cause noise.
Upflow Non-Direct Vent Installation
An inlet air restrictor plate (see Figure 2 on page 6) is
supplied with this furnace and can be found in the plastic
bagcontainingthese InstallationInstructionsandtheUser’s
Information Manual. This restrictor plate is to be used only
in non-direct vent applications. See page 5 for more
informationon installing the restrictor plateinnon-directvent
applications.
Twoinletair restrictor plates are supplied witheach furnace
– a 2" plate and a 3" plate. Use the proper restrictor plate
for the furnace model.
The flue pipe screen (see Figure 2 on page 6) should be
installed at the termination of the flue pipe and is designed
to keep objects out of the flue pipe.
Forhorizontalventing,referto Figure 9. For vertical venting,
refer to Figure 10. The vent pipe on horizontal runs must
slope upward, away from the furnace, at a minimum pitch
of 1/4" per foot of run, to prevent accumulation of
condensate.
Prime the trap system by slowly pouring 1 cup of water
down the vent pipe. On initial start-up of the unit, some of
the water used to prime the trap system may run down into
the combustion blower and cause noise.
Figure 9
Upflow Non-Direct Vent
Horizontal Venting
(CLOSED) DRAINHOLE
THRU.
59.69/56.64
"
"
THE VENT SYSTEM OF
THE FURNACE MUST BE
SELF-SUPPORTING AND
MUST NOT APPLY ANY
WEIGHT LOAD TO THE
COMBUSTION BLOWER.
Upflow Non-Direct Vent
Vertical Venting
Figure 10
(CLOSED) DRAINHOLE
THRU.
59.69/56.64
"

506303-01 Page 13 of 40Issue 0938
installations in Figure 11. This distance may be reduced in
milderclimates or where wind isunlikelytoblowflue products
to the intake pipe, but should not be less than 6”.
For horizontal venting, refer to Figure 11. For vertical
venting, refer to Figure 12. It is permissible to run the vent
verticallythrough theroofand terminate itasshown inFigure
12, and to run the combustion air intake pipe horizontally
through a side wall and terminate as shown in Figure 11.
The vent pipe on horizontal runs must slope upward, away
fromthe furnace, at a minimum pitch of 1/4" perfoot of run, to
prevent accumulation of condensate.
Do not cement air intake into the connector on burner
box. Use high temperature RTV silicone sealant so
intake pipe can be removed if service is required.
Inhorizontalventingapplications, the vent and air intake
pipe must be installed on the same side of the house
within the parameters shown in Figure 11.
Horizontal Direct Vent –
Horizontal Venting
Figure 11
Airflow Left to Right
THIS PIECE
IS OPTIONAL.
INTAKE PIPE
FLUE PIPE
3” MIN. - 48” MAX.
Overhead View
* Canadian installations: See “Canadian Applications Only” on page 6.
Long Piece of Drain Tee
(supplied)
Height to
provide
clearance
to average
snow level
Vent
Pipe
Air Intake
Pipe
Intake may be raised as
shown to obtain minimum snow
clearance requirements.
3”
2” Diameter Pipe
(supplied)
6”
18”
12”
*
*
*
*
18”
6”
12”
3”
2”
Airflow Right to Left
Figure 12
Horizontal Direct Vent –
Vertical Venting
* Canadian installations: See “Canadian Applications Only” on page 6.
12”
6.5” Min
24” Max
3”
2”
*
*
Height to
provide
clearance
to average
snow level
Drain Tee
(supplied)
Vent Pipe Air Intake Pipe
See table for air intake
length and number of
elbows allowed.
See table for vent
length and number
of elbows allowed.
6.5” Min
24” Max
12”
3” Long Piece of 2” Diameter Pipe
(supplied) *
*
Airflow Left to Right
Airflow Right to Left

506303-01
Page 14 of 40 Issue 0938
Prime the trap system by slowly pouring 1 cup of water down
the vent pipe. On initial start-up of the unit, some of the
water used to prime the trap system may run down into the
combustion blower and cause noise.
Horizontal Non-Direct Vent Installation
An inlet air restrictor plate (see Figure 2 on page 6) is
supplied with this furnace and can be found in the plastic
bagcontainingtheseInstallationInstructions. This restrictor
plate is to be used only in non-direct vent applications. See
page 5 for more information on installing the restrictor plate
in non-direct vent applications.
Twoinletair restrictor plates are supplied witheach furnace
– a 2" plate and a 3" plate. Use the proper restrictor plate
for the furnace model.
The flue pipe screen (see Figure 2 on page 6) should be
installed at the termination of the flue pipe and is designed
to keep objects out of the flue pipe.
For horizontal venting, refer to Figure 13. For vertical venting,
referto Figure 14. Theventpipeon horizontalrunsmustslope
upward, away from the furnace, at a minimum pitch of 1/4" per
foot of run, to prevent accumulation of condensate.
Prime the trap system by slowly pouring 1 cup of water
down the vent pipe. On initial start-up of the unit, some of
the water used to prime the trap system may run down into
the combustion blower and cause noise.
Airflow Left to Right
Figure 13
Horizontal Non-Direct Vent –
Horizontal Venting
* Canadian installations: See “Canadian Applications Only” on page 6.
Drain Tee
(supplied)
Inlet Air Restrictor Plate
(see page
Vent
Pipe
Height to
provide
clearance
to average
snow level
6”
12”
6)
3” Long Piece of
2” Diameter Pipe
(supplied) *
*
Airflow Right to Left
6”
Drain Tee
(supplied with unit)
Inlet Air Restrictor Plate
()see page 6
Vent
Pipe Height to
provide
clearance
to average
snow level
*
3” Long Piece of
2” Diameter Pipe
(supplied) *
12”
Figure 14
Horizontal Non-Direct Vent –
Vertical Venting
* Canadian installations: See “Canadian Applications Only” on page 6.
Height to
clearance to
snow level
average
Drain Tee
(supplied)
Inlet Air Restrictor Plate
()see page 6
For venting material,
see venting section
in these instructions. Vent Pipe
*
provide 12”
3” Long Piece of
2” Diameter Pipe
(supplied) *
Airflow Left to Right
Inlet Air Restrictor Plate
()see page
Vent
Pipe
Height to
provide
clearance
to average
snow level
Drain Tee
(supplied)
See table for
vent length
and number
of elbows
allowed
12”
6
3” Long Piece of 2” Diameter Pipe
(supplied) *
*
Airflow Right to Left

506303-01 Page 15 of 40Issue 0938
Horizontal Venting – Low Clearance Installations
Vent pipe on horizontal runs must slope upward, away from
the furnace, at a minimum pitch of 1/4" per foot of run, to
prevent accumulation of condensate. In certain horizontal,
left-to-right airflow applications, the furnace’s close proximity
to the floor joists above the unit may make it difficult to obtain
therequiredpitch/slope. Figures15and16showtheaccepted
vent practice to obtain proper pitch/slope back to furnace for
proper drainage. For direct vent applications, see Figure 15.
For non-direct applications, see Figure 16.
In all applications, minimum clearances to combustibles
must be observed (as shown in Table 1 on page 4) as well
as all other required clearances shown in Figures 11 and
13 on pages 13 and 14.
Existing Venting Systems
Whenanexistingfurnace isremovedor replaced,theoriginal
venting system may no longer be sized to properly vent the
attachedappliances. Animproperlysizedventingsystemcan
result in spillage of flue products into the living space, the
formation of condensate, leakage, etc. See the WARNING
box below for proper test procedure.
Failure to follow the steps outlined below for each
appliance connected to the venting system being
placedinto operation could result in carbonmonoxide
poisoning or death.
Thefollowingstepsshall befollowedforeachappliance
connected to the venting system being placed into
operation, while all other appliances connected to the
common venting system are not in operation:
1. Seal any unused openings in the common venting
system.
2. Visually inspect the venting system for proper size
andhorizontalpitch,asrequiredintheNationalFuel
Gas Code, ANSI Z223.1/NFPA54 (latest edition)
or the CSA B149.1, Natural Gas and Propane
InstallationCodesandtheseinstructions.Determine
that there is no blockage or restriction, leakage,
corrosion, or other deficiencies which could cause
an unsafe condition.
3. As far as practical, close all building doors and
windows between the space in which the
appliance(s) connected to the venting system are
located and other spaces in the building.
4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance not
connected to the venting system. Turn on any
exhaust fans, such as range hoods and bathroom
exhausts,sotheyareoperatingatmaximumspeed.
Do not operate a summer exhaust fan.
6. Followthelightinginstructions. Placethe unitbeing
inspected in operation. Adjust the thermostat so
appliance is operating continuously.
7. Test for spillage from draft hood equipped
appliances at the draft hood relief opening after 5
minutesof main burner operation. Use the flame of
a match or candle.
8. If improper venting is observed during any of the
above tests, the venting system must be corrected
in accordance with the National Fuel Gas Code,
ANSI Z223.1/NFPA54 (latest edition) and/or the
CSAB149.1, Natural Gas and Propane Installation
Codes.
9. After it has been determined that each appliance
remainingconnectedtotheventingsystemproperly
vents when tested as outlined above, return doors,
windows,exhaustfans, fireplacedampers, andany
other gas-fired burning appliance to their previous
conditions of use.
CARBON MONOXIDE POISONING HAZARD
WARNING
Figure 15
Horizontal Direct Vent – Horizontal Venting
Low Clearance Installation
3” Long Piece of
2” Diameter Pipe
(supplied) *
2 - 2” 90° Elbows
*
* Canadian installations: See “Canadian Applications Only” on page 6.
Floor Joist
Vent Pipe
Drain Tee
(supplied) *
Inlet Air Restrictor Plate
(see page 6)
3” Long Piece of
2” Diameter Pipe
(supplied) *
2 - 2” 90° Elbows
Figure 16
Horizontal Non-Direct Vent – Horizontal Venting
Low Clearance Installation
* Canadian installations: See “Canadian Applications Only” on page 6.

506303-01
Page 16 of 40 Issue 0938
Condensate Disposal Installation
The condensate drain should be routed directly to a locally
acceptabledisposal area.Thecondensatedrainlineshould
not be run directly to the outdoors especially in colder
climates where temperatures may cause the condensate
to freeze in the drain line.
In horizontal installations where clearance beneath the unit
islimited, an alternate method for condensate disposal trap
installation may be used (see Horizontal Installation –
Tight Clearance Below Unit on page 18).
Upflow Installation
Install the condensate drain line to the unit as follows. The
condensate can be drained from either the right or left side
of the furnace. Install the 1/2" NPT x 3/4" PVC adapter
(supplied)in the drain on the side thatthedrainingwilloccur.
Install the plastic pipe plug opposite of the drain. Using 3/4"
PVCpipe,makeaconnectionfromthe adapter just installed
to extend just outside the unit. Install a 3/4" PVC tee as
shown in Figure 17. From the tee, install the drain to the
disposalarea. The top of the teemustbeleftopenforproper
condensate drainage.
Horizontal Installation – Right to Left Airflow
Furnacemustbe mounted such that the sidethrough which
thecondensatewilldrainiselevatedaminimum of 9" above
a surface such as a floor.
Install unit at a slight pitch forward (see Figure 18).
1. Relocate the 1/2" NPT plug installed on the flue pan to
one side of the internal trap assembly (as shown in
Figure 19).
2. Connect the 1/2" NPT plug (supplied) to the opposite
sideoftheinternaltrapassemblyfromthepluginstalled
in Step 1.
3. Insert trap assembly(supplied)intofluepan(see Figure
20).
Figure 17
Condensate Disposal – Upflow
THRU.
59.69/56.64
1/2” NPT PLUG
(SUPPLIED) 1/2” NPT x 3/4”PVC ADAPTER
(SUPPLIED)
3/4” PVC
TEE MUST REMAIN
OPEN
3/4” PVC
Figure 18
Tilt Unit Forward
1/4" Max
Figure 19
Insert Plugs
Figure 20
Install Trap Assembly

506303-01 Page 17 of 40Issue 0938
6. From the tee, connect the drain to disposal area. The top
of the tee must be left open for proper condensate
drainage. The open end of the tee must be oriented so
that condensate does not run out of the opening.
7. Remove 72" vinyl hose supplied with unit and cut in half.
Connect one end of the vinyl hose to the 3/8" barbed
fitting of the 2" x 2" x 1/2" tee in vent and the other end to
the 3/8" barbed fitting on the drain trap assembly.
Horizontal Installation – Left to Right Airflow
Furnacemustbe mounted such that the sidethrough which
thecondensatewilldrainiselevatedaminimum of 9" above
a surface such as a floor.
Install unit at a slight pitch forward (see Figure 22).
1. Relocate 1/2" NPT plug installed on flue pan to one side
of the internal trap assembly (as shown in Figure 23).
2. Connect the 1/2" NPT plug (supplied) to the opposite
sideoftheinternaltrapassemblyfromthepluginstalled
in Step 1.
3. Insert trap assembly(supplied)intofluepan(see Figure
24).
4. Connect a length of 3/4" PVC pipe (3' minimum) to the
trap assembly (see Figure 21).
5. Install 3/4" tee (supplied) as shown in Figure 21.
4. Connect a length of 3/4" PVC pipe (3' minimum) to the
trap assembly (see Figure 25 on page 18).
Completing Condensate
Drain Installation
3/4" Tee
3/8" Vinyl Hose
(supplied)
Be sure to avoid double-trapping the vinyl hose. Hose must
be installed as shown.
Figure 21
Figure 22
Tilt Unit Forward
1/4” Max
Figure 23
Insert Plugs
Figure 24
Install Trap Assembly
1/2” NPT x 1/2” PVC
Adapter and Trap Assembly
(supplied)
Flue Pan

506303-01
Page 18 of 40 Issue 0938
5. Install 3/4" tee (supplied) as shown in Figure 25.
6. From the tee, connect the drain to disposal area. The
top of the tee must be left open for proper condensate
drainage. The open end of the tee must be oriented so
that condensate does not run out of the opening.
7. Connect one end of 72" vinyl hose (supplied) to 3/8"
barbedfittingofthe2"x2"x1/2"teeinventandtheother
end to 3/8" barbed fitting on drain trap assembly.
Horizontal Installation – Tight Clearance Below Unit
Incertainhorizontalinstallations, clearance betweenunit and
drain pan beneath unit may be limited. In these applications,
an alternate method may be used to install the condensate
drain trap assembly. Using two 90° elbows (field supplied),
bring condensate trap out to side of unit beyond drain pan
(seeFigure26).Aftertrap assembly has beenattachedusing
this method, follow proper instructions on the previous pages
for completing condensate drain installation.
Drain Pressure Switch Connection
(forG2D93CTand G2D95CTmulti-position unitsonly. The
G2D93CU and G2D95CU dedicated upflow units do not
require a drain switch).
Upflow Installation
The G2D93CT and G2D95CT units are shipped from the
manufacturerwitha black hose having one end connected to
the 0.10” drain pressure switch and the other end shipped
loose. FOR UPFLOW INSTALLATIONS the loose end is to
be connected to the capped tee in the hose assembly
leading from the primary pressure switch to the inducer.
Remove and discard the plastic cap from the tee and
connect the hose from the 0.10” drain pressure switch to
the tee. (See Figure 31.)
Figure 26
Condensate Drain Trap Installation – Tight Clearance Below Unit
Drain Pan
Two 3/4" 90° Elbows
1/2" NPT x 1/2" PVC
Adapter and Trap Assembly
(supplied)
End View
Field-Supplied Fittings
IMPORTANT: If vent tee is not located over the
auxiliary drain pan, it must be extended over the
pan with an elbow facing down to prevent
overflow in the event of a blocked drain. The
elbow must be installed downward over the
auxiliary pan to prevent wicking back down the
condensate line.
Do not install trap assembly any farther than 10" from unit. The pressure switch and vent
hoses must be able to reach the barbed fittings on the trap assembly.
NOTE: Vent tee to avoid
vapor lock. If connecting
to waste drain pipe, a
second trap must be
installed downstream.
Figure 25
Completing Condensate
Drain Installation
Be sure to avoid double-trapping the vinyl hose. Hose must
be installed as shown.
To avoid property damage caused by condensate drain
blockage, install a field-fabricated auxiliary drain pan with
aseparatedrainlinetotheoutsideundertheentirefurnace
and drain system, including open vent tees.
CAUTION

506303-01 Page 19 of 40Issue 0938
Be sure that the pressure switch hose does not form a
trap to hold condensation that could form from the flue
gas. Hose may be cut shorter to avoid forming a trap, if
required.
Horizontal Installation
The G2D93CT and G2D95CT units are shipped from the
manufacturer with a black hose having one end connected
tothe0.10” drain pressure switch and the other end shipped
loose. FORHORIZONTALINSTALLATIONSthe loose end
MUST be connected to the external drain trap.
Route hose through gas line access hole in cabinet. Then
connect to 1/4" barbed fitting on drain trap assembly.
For right to left airflow installations, see Figure 28. For left
to right airflow installations, see Figure 29.
Be sure that the pressure switch hose does not form a
trap to hold condensation that could form from the flue
gas. Hose may be cut shorter to avoid forming a trap, if
required.
Circulating Air Supply
When the furnace is installed so that the supply ducts carry
air circulated by the furnace to areas outside the space
containing the furnace, the return air shall be handled by a
duct or ducts sealed to the furnace casing and terminated
outside the space containing the furnace. When an air conditioning unit is used in conjunction
with the furnace, the evaporator coil must be installed
inthe discharge (supply) air. Donotinstallanevaporator
coil in the return air; excessive condensation will occur
within the furnace.
CAUTION
Pressure Switch Connection
Horizontal Installation – R to L Airflow
Figure 28
Pressure Switch Connection
Upflow Installation
Figure 27
Black
Hoses
Tee
(supplied)
Low Fire-High Fire
Pressure Switch
Assembly
Yellow Cap
Blower
Housing
Tap
Trap
0.10” w.c.
Pressure Switch
Pressure Switch Connection
Horizontal Installation – L to R Airflow
Figure 29
A return air duct system is recommended. If the unit is
installed in a confined space or closet, a return connection
must be run, full size, to a location outside the closet. The
air duct in the closet must be tight to prevent any entrance
of air from the closet into the circulating air.
If there is no complete return air duct system, the return air
connection must be sealed to the furnace casing and run, full
size, to a location outside the utility room or space housing the
furnace to prevent a negative pressure on the venting system.

506303-01
Page 20 of 40 Issue 0938
3. With the filter access opening toward the front of the
furnace, use sheet metal screws to fasten the rack(s)
to the side panel(s).
The filter slides in the rack from the front of the unit. Install
the filter(s) with the mesh side towards furnace.
Model #AFILTHA7 single side filter frame kit is available for
singlesidereturnairconnection ininstallationsrequiringmore
than 1600 CFM nominal air delivery. A bottom return filter kit
(model #AFILT529) is also available from the manufacturer.
Outlet Duct
For installations not equipped with a cooling coil, a
removableaccesspanel must be provided in the outlet duct.
The opening should be accessible when the furnace is
placedinservice.Smokeorreflectedlight may be observed
inside the casing to indicate the presence of leaks in the
heatexchanger.The cover for the opening shall be attached
in such a manner as to prevent leaks. The recommended
opening size is 6" x 14" for all sizes.
Filters
Ifa filterotherthan one suppliedbythe furnacemanufacturer
is used, it must be sized according to information provided
in Table 3.
Afilter rack and cleanable16" x 25" x 1/2" filter are supplied
withthe furnace. (Models designed for morethan1600CFM
nominal air delivery include two of each.) The filter rack is
to be installed between the return air duct and the side of
the furnace.
Refer to Figure 30 and the following instructions to install
the filter rack:
1. Using the corner embossments as a guide, mark and
cut a full-size opening in the side panel(s).
2. Using the filter rack as a template, mark and drill four
7/64” diameter screw holes in the side panel(s).
Other filter accessories are also available from the
manufacturerincludingafulllineofindoorairquality products.
Forinformationontheseproducts,contactthelocaldistributor.
Gas Supply and Piping
Refer to the furnace rating plate to make sure the furnace
is equipped to burn the gas supplied (natural or propane).
Gassupplypipingshouldbe installedinaccordancewithlocal
codes and the regulations of the utility. Piping must be of
adequate size to prevent undue pressure drop. Consult the
local utility or gas supplier for complete details on special
requirements for sizing gas piping.
Table 3
Minimum Filter Requirements
1. TheAirflow Descriptor is the two digits following the “D”
(example: G2D93CT080D16C) or “V” (example:
G2D95CT080V16C) in the model number.
2. Areas and dimensions shown for cleanable filters are based on
filters rated at 600 feet per minute face velocity.
3. Typical filter sizes are shown; however, any combination of
filters whose area equals or exceeds the minimum area shown
is satisfactory.
Filter Rack Mounting Hole
Screw
Filter Rack
Corner Embossments
Front of Cabinet
Filter Rack Installation
Figure 30
Figure 31
Bottom Filter Location
Filter
Base
Side